Showing off his progress in the gym while taking a jab at the recent negative media attention, Justin Bieber posted two shirtless selfies on Instagram Monday (April 15).

The "Beauty and a Beat" singer captioned the first one, "'Uh oh @justinbieber is losing it taking shirtless pics in the mirror' -funny people."

A second snapshot, also exposing the top of his undies, included the comment, "'Breaking news worldwide @justinbieber just posted 2 shirtless pictures he must be going crazy' -funny people #forthefansanyways #dontbecreepin :p."

Later, he switched to a more sentimental subject, posting a pic of his younger siblings playing with the comment, "How do kids nowadays know how to work iPads and I hardly knew how to play with my dinky cars," while his Twitter said, "I miss my brother and sister. Love u @JaxonBieber @JazmynBieber."